Mechanically-driven fan



.I. D. KA'RLE.

MECHANICALLY-DRIVEN- FAN.

APPLICATION FILED APR. 25, 1919.

Patented Nov. 14, 1922.

2 SHEETS-SHED I.

INVENTOR TTORN WITNESSE SZ J. D. KARLE.

MECHANICALLY DRIVEN FAN.

APPLIQATION FILED APR-25,19l9.

1,435,477; Patented Nov-14,1922.

2 SHEETS-SHEET 2.-

wnNz l-zsz' INVENTOR loose pulley. -Fig. 3 is a fragmentary side citizen of the United States, residing at driven fans, more particularly of the type adapted; to receive power through a drivfor thedriving mechanism.

which is adapted for mounting upon azpower blades whichare protected by a suitable than Joan n. KARL or nosELLE PARK, nnw .iEnsnY, essrenoa TO THE srnennneuurac'runrne COMPANY, A oon'romirron or NEW JERSEY.)

innermnroemmnnrvnn FAN;

Application filed April 25,"

T 0 all whom it may concern.

Be it known that 1, Joint D. KARLE, a

Roselle Park, in the county of Union and State of New Jersey, have invented. certain new and. useful Improvements in Mechanically-Driven Fans, of whichthe following is a specification, reference being hadtherein to the accompanying drawings.-

a This invention relates to Jmechanically ing belt, and has for an object to provide a fan which may be readily started'and stopped and which will not require thefinstallationof additional protective devices A further object of the invention is to provide a power fan of simple construction table of the type commonly used to support sewing or other small machines in factory installations.

urther objects of, the invention will appear from thefollowing description and claims.

In the present embodiment of the inventhe fan is provided with 'a supporting standard including a pair. of legs which are channeled to receive and protect the limbs of the drivingbeltr The legs support a hol-' low headhaving bearings for a fan-shaft iwhich carries a t'ight'and a loose pulley. A

belt-shifting device is "mounted mainly within the hollow head but includes a fingerpiece'which projects externally; of said head and may be readily manipulated to shift the belt from one to the other of the pulleys.

The fan-shaft. carries. the usual propeller guard. v

In the accompanying drawings, F ig. 1 is a rear end elevation of the power fan of my invention. F ig; 1 isla sectional view illustrating in detail how the belt shifting device of Fig. lis mounted. Fig. 2'is'a side elevation of the complete fan, partly in. section, showing the driving belt of the 5 is a perspective view of 'is, they are concavo-conveX or substantially tosecure the frame of the fan'to the table- .16, is the tight'belt-pulley 18 having a belt- 20. -16, alon 'pulley'21:having a belt-groove'22and an 1919. =Seria1 No. 292,603.

the belt-shifting lever and Fig. 6=is a perspective view of] the platewhich holds the belt-shifting lever in either running ornon-running position.

While the "present fan may be put toa variety of. uses, itwill be described as applied to a power-table, preferably such as Dosch, Serial No. 17 3,083, filedJ une''-6,1917,

vided in the present instance with'a driving pulley 4.",The fan proper, in-its prefe'rred disclosed in theapplication of Oliver L. i 1

embodiment, is formed with a frame shaped likethe letter A and includingthe -legs.55 which carry the hollow'head 6. The legs 5+5 are each of channel formation; that U shaped, in cross-section, asshown in Fig. 4.- 'At their-lower ends thez-leg's 5 5. are

which suitable screws 8-8 may be passed top 1. It willbe noted that the legs 5- 5 are arranged withtheirlhollow or. concave sides facing each other and that they are connected above the feet 7 7uby the spaced I braces or transverse members .99."

he hollow head 6 of the'frame-is formed with spaced front and back walls 10 and 11,

respectively, which are connected by-a' lower brace 12, a side brace-13 and a top brace 14. :Jo'urnaled horizontally in suitable ball-- bearings 15-15 incthe walls 10 and 11..is

theifan shaft 16 having an'v outboard projectionv carrying the fan-blades 17. Fixed to the fan-shaft 16, within the head groove 19 and aperipheral braking surface Mounted to turn upon the fan-shaft gside the tight pulley 18, is a loose 1 cent side walls of the grooves '19 and 22 form a sort of central ridgeQO Fig. 3, between flared outwardly to form feet 7'7 through the two pulleys, over which the belt24 may be readily shiftedxfrom one pulley tothe' other by a manually controlledbelt-shifting.

device, preferably in theform ofa lever 25.

. The belt-shifting lever 25is' freely pivoted upon the headed vertical screw-.pin'26'fixed to the"brace 12; thefllever 25- being formed at its pivoted end with a hole 27 which is larger than. the pin 26 which passes through it. A spring 28 surrounding the pin 26 and interposed between the lever 25 and brace 12 serves to yieldingly hold the lever 25 horizontally in engagement with the under surface of the head of the pin 26 It will be understood that by virtue of the above construction the lever 25 may be depressed but when released will tend to assume a horizontal position.

, The lever 25 isformed between its ends with a belt-guiding slot 29, Fig. 5, and with a laterally projecting ear 30 which is formed with a socket 31 holding a brake-shoe 32 of some suitable material, suchas leather. This brake-shoe is adapted to bear yieldingly upon the peripheral braking surface 20 of the tight pulley 18 when the belt-shifting lever is thrown. to the left or non-running position, Fig. 2. When the lever 25 is shifted to running position, Fig. 3, the brake-shoe 32 is carried to one side of the surface 20.

To facilitate manual control of the lever 25, its free end is extended to the exterior of the head 6 and formed with a roughened handle or finger-piece 33. The belt-shifting lever 25 is held against lateral movement in either of its extreme positions by means of a'retaining plate 34% having the retaining slots 35-'36, separated by tooth 37. :In shifting the lever from one of these slots to the other, it'must be depressed below the tooth 37, thus insuring that the brake-shoe 32 will place by screws 39 and 40, applied to the brace 13 and retainer plate 34, respectively. A wire guard of nOllllllOl'li iflllll pref erably secured to the side wall 10 of the head 6 by meansfof screws 42.

From the foregoing it will be readily understood that the driving belt 24 is effectively housed within the legs 5 and head 6 of the standard which supports the fan to be driven. In other words the fan itself is inherently capable of protecting its driving belt, and no additlonal protective devices are required.

By. virtue of the ridge 2O formed by the adjacent side walls of the grooved. belt-pulleys 18 and 21, the driving belt will tend to snap over to the pulley toward which it is being shifted as soon as said belt is shifted past the center line of said ridge. For this It will be noted that the spring 28 reason, if the belt shifting lever 25 is not moved the entire distance from one of the slots in the plate 34 to the other, but is released while in contact with the extremity of the tooth 37, it will be thrown over into one or the other of said slots, depending upon which side of the center line of the ridge the belt 24c happens to be when the belt shifting lever 25 is released.

Having thus set forth the nature of the in vention, what I claim herein is p 1. A belt-fan having, in combination, a fan-shaft, tight and loose belt-pulleys and fan-blades mounted on said shaft, and a standard transversely of which said shaft is journaled, said standard having a pair'of hollow spaced legs substantially enveloping the limbs of a drivingbelt and means f0 shifting the belt. I I

2. A belt-fan comprising, in combination, a standard, a fan-shaft journaled in and transversely of said standard adjacent the upper end of the latter, tight and loose beltpulleys carried by said fan-shaft, a beltshifting device carried by said standard adjacent said pulleys, and means for arresting rotation of the fan-shaft when the belt is shifted onto the loose pulley.

A belt-fan comprising, in combination, a standard, a fan-shaft journaled in and transversely of said standard adjacent the upper end of the latter, tight and loose beltpulleys carried by said fan-shaft, a beltshifting lever fulcrumed in said standard,

and a brake-shoe carried by said lever and adapted to bear upon said tight pulley when the belt is shifted onto the loose pulley.

4:. A belt-fan comprising, a frame'including supporting legs and a hollow head, a fan-shaft journaled in said head, tight and loose pulleys carried by said shaft within said head, and a belt-shiftingdevice mounted mainly within said head and including a finger-piece extending exteriorly thereof.

5. In a belt-fan, a supporting standard comprising a pair of hollow legs each of which is subssantially U-shaped in cross-'section, said legs being disposed with their hollow sides facing each other, a hollow head carried by said legs, a fan-shaft journaled in said head and a belt=pulleyfi zred to said shaft within said head.

6. In a belt-fan, a supporting standard comprising a pair of hollow legs each of which is substantially U-shaped in cross section, said legs being disposed. with their hollow sides facing each other, a hollow head carried by said legs, a fanshaft, tight and loose belt-pulleys carried by said shaft within said head, and a device for shifting the belt from. one to the other of said pulleys.

7.'In a belt-fan, a supporting standard comprising a pair of hollow legs each of which is substantially U-shaped in cross-section, said legs being disposed with their hollow sides facing each other, a hollow head carried by said legs, a fan-shaft, tight and loose belt-pulleys carried by said shaft within said head, a device for shifting the belt from one to the other of said pulleys, and

braking means for arresting rotation of the fan-shaft when the belt is shifted onto the loose pulley.

8. In a belt-fan,- a supporting standard comprising a pair of hollow legs each of which is substantially U-shaped in cross-section, said legs being disposed with their hollow sides facin each other, a hollow head carried by said legs, a fan-shaft, tight and loose belt-pulleys carried by said shaft within said head, a device 'for shifting the belt from one to the other of said pulleys,

andmeans carried by said device for arrest ing rotation of the fan-shaft when the belt is shifted onto the loose pulley;

9. In a belt-fan, a supporting standard comprising a pair of hollow legs adapted to envelop the limbsof a driving belt, a hollow headcarried by said legs, a fan-shaft jour naled horizontally in said head, and a beltpulley-fixed to said shaft within said head.

In testimony whereof, I- have signed my name to this specification.

' JOHN 'D. KARLE. 

